The Propeller Nebula in Cygnus
Tricolor (SII/Ha/OIII) narrowband image.
Exposure: Total exposure time about 22.3 hours, 25 x 20mins Ha, 18 x 20 mins SII, 21 x 20 mins OIII. All bin 1x1. Captured over 8 nights in August 2016.
Light pollution: Bortle 8 (white zone, NELM about 4.5)
Image scale at capture: 0.6 arcsecs/pixel = f/5.7
Scale of presentation: 1.2 arcsecs/pixel (50% reduction)
Equipment:
Scope: C11 (standard, not Edge) with Celestron 0.63 reducer
Mount: CPC1100, connected via Nexremote
Camera: SXVR-H694, connected via SX ASCOM driver 6.2.1.17140 (SX 1.2.2 also installed)
Filter wheel: Atik EFW2 with 7x1.25 carousel and Artemis 2.4.3.0 driver
Filters: Astrodon 5nm Ha/SII, 3nm OIII, Type IIe LRGB
Focuser: Rigel Systems GCUSB_nStep with driver version 6.0.7
OAG: Celestron OAG
Guide cam: ASI120MM, 1 second exposures
Automation SW: Sequence Generator Pro 2.6.1
Guide SW: PHD2.6.3, connected to guide cam via native SXV driver
ASCOM: ASCOM 6.3.0.2831
Platesolving: PlateSolve 2, failover to local Astrometry.net 0.19 server
Collimation: Metaguide 3, using ASI120MM connected via ZWO Direct Show driver 3.0.0.2
